This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A330568 #6 Jan 06 2020 21:21:28 %S A330568 1,6,6,15,9,18,9,15,6,6,1 %N A330568 Coordination sequence for 1-skeleton of rhombic enneacontahedron with respect to a hexavalent node. %C A330568 Computed by _Fred Lunnon_. %D A330568 George W. Hart, "A Color-Matching Dissection of the Rhombic Enneacontahedron", Symmetry: Culture and Science, vol. 11, 2000, pp. 183-199. %H A330568 George W. Hart, <a href="http://www.georgehart.com/dissect-re/dissect-re.htm">A Color-Matching Dissection of the Rhombic Enneacontahedron</a> %H A330568 Wikipedia, <a href="https://en.wikipedia.org/wiki/Rhombic_enneacontahedron">Rhombic Enneacontahedron</a> %Y A330568 Cf. A330566, A330567. %Y A330568 See also A329500, A330555, A330564. %K A330568 nonn,fini,full %O A330568 0,2 %A A330568 _N. J. A. Sloane_, Jan 06 2020